The aim of the study was to assess the efficacy of three methods of enamel remineralization on initial approximal caries: (1) a nano-hydroxyapatite gel, (2) gaseous ozone therapy, (3) combination of a nano-hydroxyapatite gel and ozone. Patients (n = 92, age 20-30 years) with initial approximal enamel lesions on premolar and molar teeth (n = 546) were randomly allocated to three groups subjected to a 6-months treatment: Group I: domestic nano-hydroxyapatite remineralizing gel, group II: in-office ozone therapy, group III: both domestic remineralizing gel and ozone therapy. Caries lesions were assessed on bitewing radiographs at baseline, after 1 year and after 2 years. At one-year follow-up, the smallest rate of lesions with remineralisation (36.5%) was found in group I, and the highest (69.3%)-in group III. In group III a significant remineralisation was noticed in after 1 year and then a demineralisation after 2 years. Thus nano-hydroxyapatite gel and ozone therapy exert some capacities to remineralize approximal enamel and dentine subsurface lesions of premolar and molar teeth. Moreover, the combination of both methods produces the best effect compared to nanohydroxyapatite or ozone therapy applied alone. However, the treatment should be continued for a long time in order to achieve nonrestorative recovery of caries.

Photogrammetry is a science and technology which allows quantitative traits to be determined, i.e. the reproduction of object shapes, sizes and positions on the basis of their photographs. Images can be recorded in a wide range of wavelengths of electromagnetic radiation. The most common is the visible range, but near-and mediuminfrared, thermal infrared, microwaves and X-rays are also used. The importance of photogrammetry has increased with the development of computer software. Digital image processing and real-time measurement have allowed the automation of many complex manufacturing processes. Photogrammetry has been widely used in many areas, especially in geodesy and cartography. In medicine, this method is used for measuring the widely understood human body for the planning and monitoring of therapeutic treatment and its results. Digital images obtained from optical-electronic sensors combined with computer technology have the potential of objective measurement thanks to the remote nature of the data acquisition, with no contact with the measured object and with high accuracy. Photogrammetry also allows the adoption of common standards for archiving and processing patient data (Adv Clin Exp Med 2015, 24, 4, 737-741).

Introduction: Functional disorders of the temporomandibular joints (TMJ) in the contemporary population are considered by World Health Organization to be the third most frequent dental disease after caries and periodontitis. It is thought to affect 84% of the adult population. In patients aged 65 years and older these disorders become more severe and may affect up to 100% of this age group.Material and method: We examined 150 patients aged 35–70 years (mean age 46.5 years). All patients were diagnosed in 2006–2010 at the Department of Dental Prosthetics of the Pomeranian Medical University in Szczecin due to suspected more or less advanced functional disorders of the stomatognathic system, particularly TMJ. The severity of the disorders was identified using the Helkimo index.Results: Functional disorders of the TMJ and mild sleep apnoea were diagnosed in 112 patients. Findings from the study indicated that the severity of sleep apnoea was positively correlated with the duration and severity of TMD.Conclusion: Most patients did not link the symptoms of sleep apnoea with dysfunctions of the stomatognathic system.

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Introduction: A great number of hereditary diseases have been correctly diagnosed and treated recently as a result of the rapid progress and constant development of genetic research. Case report: This study presents the case of 24-year-old female patient suffering from MELAS syndrome, which is inherited in the maternal line -as are other mitochondrial diseases. This disorder was first described in 1984 by Steven G. Pavlakis et al. Our paper describes prosthetic procedures that were undertaken as treatment for the patient mentioned above, who had been referred from a hospital neurological clinic for consultation and possible treatment due to her refractory migraines. Regardless of the previously noted symptoms, the patient was examined for bruxism, and considering the positive outcome of the test, typical treatment, including a stabilization appliance was implemented. It gives significant improvement and lesser occurrence of neurological symptoms. Conclusions:The patient stays under the constant, periodic control of our department. Keywords: MELAS syndrome; occlusal splint; bruxism; doxepin; venlafaxine; surface electromyography.